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Ships within 48 hours · Estimated delivery Aug 24 - Aug 29
Outer Diameter: 6"
Indoor and Outdoor Use
Hot Spot Relay 2010-2019
add 2 tablespoons (30ml) warm water
Together the two cartridges sanitize the water two ways: minerals as a first line of defense
FROG® Serene Bromine Cartridge (Yellow) | Spa Refill Type_Control Outer Diameter: 6"The FROG Serene Bromine Cartridge is the consumable yellow cartridge for FROG's bromine based Serene system designed for hot tub owners who want the cleaner, gentler water of a mineral and bromine program without the daily fussing of traditional bromine dosing. Each 150g cartridge lasts 2 to 4 weeks depending on spa size and use, releasing bromine at the rate you set with the adjustable dial. This is the standard single cartridge refill what you
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